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Asian Journal of Crop Science
eISSN: 2077-2041
pISSN: 1994-7879

Editor-in-Chief:  Arvind Singh Tomar
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Research Article
Correlations and Path Coefficients for Yield Related Traits in Soybean Progenies
Thi Thuy Hang Vu, Thi Tuyet Cham Le, Dinh Hoa Vu, Thanh Tuan Nguyen and Thi Ngoc
Background and Objective: Soybean breeding is striving to develop high yielding cultivars. Understanding of the association between yield and its components and the contribution of those yield components to yield is important to the breeding and selection process. This study sought to determine the correlations, the direct and indirect effects of yield components on grain yields in soybean progenies. Materials and Methods: Two soybean crosses at F6 and F7 generations were grown in field condition. The correlations and path coefficents of 8 measured traits, viz growth duration (days), plant height (cm), first pod insertion height (cm), ratio of first pod insertion height to plant height, total number of pods per plant, total number of seeds per plant, 100 seed weight (g) and grain yield per plant (g/plant) were computed. Results: There were consistencies of correlations across generations and higher direct and indirect effects in F6 than in F7. Most direct effects were in agreement with correlations, indicating true associations. Significant positive correlations (r) and highly positive direct effects on grain yield were observed for total number of pods (r = 0.406-0.928), total number of seeds (r = 0.434-0.939) and 100 seed weight (r = 0.361-0.626) across generations and crosses. Ratio of first pod insertion height to plant height had significant indirect effects on yield via component traits. Conclusion: The selection strategy could be applied in early generations for significant yield components. Besides pod and seed related traits, ratio of first pod insertion height to plant height should also be considered for selection.
Research Article
Effect of Ratooning on Growth and Nutritional Quality of Amaranthus (Amaranthus tricolor) in Alfisol South Western Nigeria
Ayeni Leye Samuel, Oyebamiji, Kehinde Johnson, Morakinyo-Fasipe Olutoye Temitope and Agbona Ademola Isaac
Background and Objective: Increase in human population that results in food scarcity and malnutrition necessitates the need to increase growing of vegetable that is early maturing with well ratooning capacity. This study aimed to examine the effect of ratooning on growth, yield and nutrient uptake of Amaranthus tricolor. Materials and Methods: Two field experiments were conducted in 2017 at 2 different locations in Okegun situated at Ondo and Adeyemi College of Education Ondo, Teaching and Research Farm Ondo, South Western Nigeria. The treatments were harvesting by uprooting the plant or total harvesting of the plant at once (1 time harvest), twice (2 times harvest) and thrice (3 times harvest). The treatments were arranged in Randomized Complete Block Designed (RCBD) with three replications. The mean data for the two experiments were generated and used to discuss the findings. Results: Relative to total harvest, 2 and 3 times harvests significantly increased (p<0.05) plant height, fresh weight, dry weight, number of leaves and moisture content. Compared to total harvesting, 3 times harvest of Amaranthus tricolor increased plant height, number of leaves, fresh weight, dry weight and moisture content. Three times harvests recorded highest K. Two times harvest had highest Ca, Mg, Na, N and P. One time harvest significantly (p<0.05) recorded the highest Mn, Fe, Cu and Zn. Relative to 1 time harvest, 2 times harvest recorded highest increase in crude protein and fat content of Amaranthus tricolor. Conclusion: This study reported that the 3 times harvest recorded the highest growth parameters while 2 times harvest recorded the highest nutritional value of Amaranth in this experiment.

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